.input-area {
    padding: 16px 20px;
    background: white;
    border-top: 1px solid #e1e5e9;
    box-shadow: 0 -1px 3px rgba(0, 0, 0, 0.1);
}

.input-container {
    display: flex;
    align-items: flex-end;
    background: #f7f7f8;
    border: 1px solid #d9d9d9;
    border-radius: 12px;
    padding: 8px 12px;
    gap: 8px;
    transition: border-color 0.2s;
}

.input-container:focus-within {
    border-color: #40a9ff;
    box-shadow: 0 0 0 2px rgba(24, 144, 255, 0.2);
}

.message-input {
    flex: 1;
    border: none;
    outline: none;
    background: transparent;
    font-size: 14px;
    line-height: 1.5;
    padding: 4px 0;
    resize: none;
    min-height: 20px;
    max-height: 120px;
    font-family: inherit;
    color: #333;
}

.message-input::placeholder {
    color: #999;
}

.message-input:disabled {
    color: #999;
    cursor: not-allowed;
}

.send-button {
    background: #d9d9d9;
    color: #999;
    border: none;
    border-radius: 8px;
    width: 32px;
    height: 32px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s;
    flex-shrink: 0;
}

.send-button.active {
    background: #1890ff;
    color: white;
}

.send-button.active:hover {
    background: #40a9ff;
}

.send-button:disabled {
    cursor: not-allowed;
    opacity: 0.6;
}

.input-status {
    margin-top: 8px;
    font-size: 12px;
    color: #666;
    text-align: center;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .input-area {
        padding: 12px 16px;
    }
    
    .input-container {
        padding: 6px 10px;
        border-radius: 10px;
    }
    
    .message-input {
        font-size: 13px;
    }
    
    .send-button {
        width: 28px;
        height: 28px;
    }
}
